ser melhor.

http://lila-erc.eu/data/lexicalResources/LatinPortuguese/Velez/id/LexicalSense/n2718.sg10.s01 an entity of type: LexicalSense

ser melhor. 
Interdum additur dat. 
In tertiis personis sing. significat, 
ser melhor, 

data from the linked data cloud